Evaluation of Lentil (Lens culinaris Medikus) Germplasm for Heat Tolerance
Loading...
Date
2022
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
The present investigation was carried out in a set of 48 germplasm
lines along with 4 check varieties of lentil, evaluated in augmented design
in three environmental conditions viz., normal sown environment (E1), late
sown environment (E2) and very late sown environment (E3) with four
blocks during rabi, 2021. The analysis of variance showed significant
difference among the germplasm lines for all the traits studied viz., days to
50 per cent flowering, days to maturity, plant height (cm), number of
primary branches per plant, number of pods per plant, number of seeds
per pod, seed yield per plant (g), biological yield per plant (g), harvest
index (per cent), 100-seed weight, chlorophyll content (SPAD), relative
leaf water content (per cent) and membrane stability index (per cent) in all
the environmental conditions. It indicates existence of significant variability
among the germplasm lines.
The highest PCV and GCV were observed for seed yield per plant
and harvest index in all the environmental conditions. All the characters
show high heritability. Similarly, out of thirteen, ten characters showed
high genetic advance as percent of mean, while three characters viz.,
chlorophyll content (SPAD), relative leaf water content (per cent) and
membrane stability index (per cent) showed moderate genetic advance as
per cent of mean. High genetic advance as percent of mean coupled with
high heritability were observed for most of the characters viz., days to 50
percent flowering, days to maturity, plant height (cm), number of primary
branches per plant, number of pods per plant, number of seeds per pod, seed yield per plant, biological yield per plant, harvest index (per cent) and
100-seed weight in all the environmental conditions. Selection based on
these characters will be rewarding for improvement of the germplasm
lines.
The character association analysis revealed that plant height,
numbers of primary branches per plant and number of pods per plant were
observed positive and significant with seed yield per plant under all the
environmental conditions.
The path analysis revealed that number of primary branches per
plant and number of pods per plant were effective for the selection of high
yielding germplasm lines as they exhibited high positive direct effect along
with significant positive correlation with seed yield per plant in all the
environmental conditions.
On the basis of HSI (Heat Susceptibility Index) three lines viz., RKL
32-8, RKL 47E130 and RKL 1003-53E under late sown environment, two
lines RKL 32-8 and RKL 47E130 under very late sown environment were
found highly heat tolerant among the examined germplasm lines.
The high yielding heat tolerant lines viz., RKL 32-8, RKL 44-10,
RKL 47E-130, RKL 608-1, RKL 23C-2741, RKL 35D-62, RKL 1003-35-S
and RKL 1003-53E were identified and could be used in lentil breeding
programme for generating elite heat tolerant cultivars or through
hybridization for obtaining desirable segregants in the subsequent